While Windows Phone 7 has a lot going for it, and will be even more appealing once Mango arrives in full force, one place where Android clearly has the upper hand is with 4G data. With no LTE, no WiMAX models to speak of, it’s not currently a platform known for access to high-speed data. That could easily change with the wave of Mango phones on the horizon, and there’s some evidence now that we could be seeing some HSPA+ models on T-Mobile.

The image above is supposedly of stickers printed for T-Mobile stores, to be affixed to phones on display. In addition to standard WP7 stickers, the carrier also looks to be preparing ones for WP7 devices that also have 4G connectivity. With T-Mobile and AT&T, it can be hard to keep track of just what they consider 4G at the moment, but T-Mobile is expanding its network to offer 42Mbps HSPA+ in more and more areas, and has 21Mbps HSPA+ in even more locales. We can’t say just how many WP7 models T-Mobile is thinking about carrying with 4G, but those sure look like a lot of stickers.

If you haven’t checked out Windows Phone 7 yet, do you think you’d be more likely to if you had a selection of 4G models to choose from?